{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2023-52443", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: avoid crash when parsed profile name is empty\n\nWhen processing a packed profile in unpack_profile() described like\n\n \"profile :ns::samba-dcerpcd /usr/lib*/samba/{,samba/}samba-dcerpcd {...}\"\n\na string \":samba-dcerpcd\" is unpacked as a fully-qualified name and then\npassed to aa_splitn_fqname().\n\naa_splitn_fqname() treats \":samba-dcerpcd\" as only containing a namespace.\nThus it returns NULL for tmpname, meanwhile tmpns is non-NULL. Later\naa_alloc_profile() crashes as the new profile name is NULL now.\n\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 6 PID: 1657 Comm: apparmor_parser Not tainted 6.7.0-rc2-dirty #16\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\nRIP: 0010:strlen+0x1e/0xa0\nCall Trace:\n \n ? strlen+0x1e/0xa0\n aa_policy_init+0x1bb/0x230\n aa_alloc_profile+0xb1/0x480\n unpack_profile+0x3bc/0x4960\n aa_unpack+0x309/0x15e0\n aa_replace_profiles+0x213/0x33c0\n policy_update+0x261/0x370\n profile_replace+0x20e/0x2a0\n vfs_write+0x2af/0xe00\n ksys_write+0x126/0x250\n do_syscall_64+0x46/0xf0\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n \n---[ end trace 0000000000000000 ]---\nRIP: 0010:strlen+0x1e/0xa0\n\nIt seems such behaviour of aa_splitn_fqname() is expected and checked in\nother places where it is called (e.g. aa_remove_profiles). Well, there\nis an explicit comment \"a ns name without a following profile is allowed\"\ninside.\n\nAFAICS, nothing can prevent unpacked \"name\" to be in form like\n\":samba-dcerpcd\" - it is passed from userspace.\n\nDeny the whole profile set replacement in such case and inform user with\nEPROTO and an explaining message.\n\nFound by Linux Verification Center (linuxtesting.org)." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "04dc715e24d0", "version_value": "9286ee97aa48" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "4.11", "status": "affected" }, { "version": "0", "lessThan": "4.11", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.306", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.268", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.209", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.148", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.75", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.14", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.7.2", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/9286ee97aa4803d99185768735011d0d65827c9e", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/9286ee97aa4803d99185768735011d0d65827c9e" }, { "url": "https://git.kernel.org/stable/c/1d8e62b5569cc1466ceb8a7e4872cf10160a9dcf", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/1d8e62b5569cc1466ceb8a7e4872cf10160a9dcf" }, { "url": "https://git.kernel.org/stable/c/5ff00408e5029d3550ee77f62dc15f1e15c47f87", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/5ff00408e5029d3550ee77f62dc15f1e15c47f87" }, { "url": "https://git.kernel.org/stable/c/0a12db736edbb4933e4274932aeea594b5876fa4", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/0a12db736edbb4933e4274932aeea594b5876fa4" }, { "url": "https://git.kernel.org/stable/c/9d4fa5fe2b1d56662afd14915a73b4d0783ffa45", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/9d4fa5fe2b1d56662afd14915a73b4d0783ffa45" }, { "url": "https://git.kernel.org/stable/c/5c0392fdafb0a2321311900be83ffa572bef8203", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/5c0392fdafb0a2321311900be83ffa572bef8203" }, { "url": "https://git.kernel.org/stable/c/77ab09b92f16c8439a948d1af489196953dc4a0e", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/77ab09b92f16c8439a948d1af489196953dc4a0e" }, { "url": "https://git.kernel.org/stable/c/55a8210c9e7d21ff2644809699765796d4bfb200", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/55a8210c9e7d21ff2644809699765796d4bfb200" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html", "refsource": "MISC", "name": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "refsource": "MISC", "name": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html" } ] }, "generator": { "engine": "bippy-a5840b7849dd" } }